Paper slitter



Jan. 16, 1940. D. R. M KINLEY EIAL I 2,187,211

. PAPER SLITTER Filed June 12, 1939 Z2 Z5 Z4 INVENTOR.

1 'ATTORNEYS.

I Patented at. 16,1940

T- D ST ES I PAPER sm'r'run r I, David R.;McKinley andleter IYanNorden,

Kalamazoo, Mich.

Implication magi 193 9, Serial a 278,602

Claims. (01. 164 60 1 This inventionrelates to paper slitters and hasfor its objects:

First, to produce a new and improved paper slitter. Second, to producesuch a slitter in. which "the bearing and other working parts, exclusiveof the knife, are protected. against the lint and the like whichcollect-oh machinery of thistypeh facilitate removal of the blades forThird, to produce such. a slitterin iwhich the knives are heldresiliently in cooperating position and in which the knives may beseparated .for "the purposes of adjustment and sharpeningby an axialmovement and in which one of the knives byfa simple "manipulation, be ret -cted from the other knife away from the plane or the paper onjwhichthe knives are working to sharpening and the adjustment oi the device.Other objects and advantages pertaining to details and economies oi.construction and operation will appear ironrthe description to follow.;The invention is jd efined in the claims. A preferred embodiment of myinvention is illustrated in the accompanying drawing, in which:

Fig. l is a view partly in section of our improved slitter bringing: theknives in cooperating cutting position, taken on line ie-l of Figs; 2and/1.

Fig. 2 is a detail sectional View taken on line 2 -2 ofFigl.

Fig. 3 is a view similar to that of Fig. l show- .ing the knivesseparated for the purposes of adjustment. T Fig. 4 is a view of the rearof the. supporting casing taken from. the right of Figs; 1 and 2.

In our improved device are providedthe rotary cutting knives i andZdisposed to sever a web of paper 3 which is fed thereto. The knife 2 is,adjustably supportedbymeans of .a support 4 having column 5 slidablysupportedin the supporting block 6. The support 4} is provided withcylindrical bore in whiehis'disposed a cylindrical member iiywhich isboth slidable and rotatable in the bore 1. The cylindricalmember Elcarries" the'axie 9 for the knife 2.. The axle is suitably supported inball bearings ID and H mounted on the cylindrical member and extendsaxially of the cylindrical member 8 but is eccentrically disposed withrespect to the axis of the cylindrical member Band of the bore 1. On the1 axis is a suitable bladeholder l2 withnut l3 for clamping the blade 2.Theaxle 9 extends from the end M of the bore 1. The end I5 of the bore 1is closed by a suitable cap [6 held in place by screws l1 andhav-ingaperture l8. A stem 19 is fixed to the cylindricalmember" 8 and extendsthrough the aperture l8. j To the stem 19 is fixed a ring handleZILwhich may be used for moving the cylindrical member -8 axially of thebore 1 or for rotating it therein. 5 The handle 20 is provided with anaperture 2| to be engaged byl a suitable hook and is pro- .videdwith apin 22. spring pressed by a spring 23 in a bore 24 in the handle toengage recesses 25, ZEEand 21 in the cap" 16. A compression l0 spring'28 is mounted in the bore 1 and engages the cylindrical member-fl ngingit to the left of Fig. 1 to hold the knives I. and 2' in resilientoperating engagement. One end of the spring bears against the cap H5.The support land the cylindrical member 8 areconnected by a pin and slotconnection indicated at. 29. The pin extends from the support to engagethe slot. 3! in the cylindrical member 8. This slot is provided withaportion 32 extending-in a directionaxial of the bore to lock thecyliridricai member against rotation whenthe knivesare in operativeengage merit. jand'a portiontii extendingcircumferene tially-andconnected with the portion 32 serving u v "to hold the knives out ofengagement when the 5 cylindrical member 8 ismoved to the right in Fig.

' 1 isthen rotated tomove the knife 2 upwardly as viewed in i Fi "l Iandtheknife 1.

away from the paper In Fig. 1, we show the knives in cutting dengagementh In Fig. 3; we show the knives separated axially and also with theknife 2 moved. away from the plane of the paper. This is accomplished bypulling on the handleZO to retract the cylindrical member 8 in the bore1 and by then turning the handle 20 in a counterclockwise direction sothat the pin 30 will engage in the portion 33 of the slot 31 to hold theblades in axially; separated position while the eccentric mountingof theaxle 9 and the turning of the 0 cylindrical member raise thebl ade 2 tothe position shown;

. It-lwillbej apparentthat when the blade 2 has beenmovedto the positionshown in Fig. 3, it is possible to easily remove the blade 2 forsharpen- 2 .ingand ityis possiblealso to adjust the blades to thedesired relative position before moving the blade 2 downso that itwillmeet blade I and then permitting it to move axially. to resilientengagement withthe blade. This device is particularly useful because ofthe ease of adjustment and becauseit is possible by merely reaching inwith a hook to move the blade from the position of Fig. 1 to theposition of Fig. 3, and because when the blades are in operatingposition they are held accumulation of lint whichinterferes resilientlyin engagement. It will be apparent that the working parts are wellprotected against with the operation of slitters in general.

If it is desired, the slot 3| may be'provided with an extension 34 bymeans of which theblade 2 maybe held away from the blade I without,materia'lly raising the blade away from the plane of the paper to beout.

Having thus described our invention, what we claim as new and desireto'secure by Letters Patent is: j i v 1. In an apparatus of the classdescribed, the combination of a knife, a'second knife in cooperativerelation thereto and having a support having a cylindrical bore.therein, a cylindrical member rotatably and slidably mounted in saidbore, an axlefor said secondknife eccentrically" mounted on and parallelto the axis of said cylindrical member and extending from one end of incutting relationship, a connected portion extending cireumferentially'of the bore to lock said cylindrical member against axial movement insaid bore when it has been retracted to separate said knives and when itis rotated, and means on said cylindrical member extending from saidbore for retracting said cylindrical member and for rotating it.

'2. In an apparatus of the class described, the combination of a knife,a'second knife in cooperative relation thereto and having a supporthaving a cylindrical bore therein, acylindrical member rotatably andslidably mounted in said bore, an axle ior said second knifeeccentrically mounted on and parallel to the axis of said cylindricalmember and extending from one end of said bore-whereby on rotation ofsaid cylindrical member, said knives may be moved out of axial register,a closure for the other end of said bore, a spring in said bore urgingsaid cylindrical member axially of said bore to force said second kniferesiliently into operative relationship with said first mentioned knife,and means on said cylindrical member extending from said bore forretracting said cylindrical member and for rotating it. i

3. In an apparatus ofthe class described, the combination of a knife, asecond knife in cooperaxtive relation thereto and having a supporthaving acylindrical bore therein, a cylindrical member rotatably andslidably mounted in said bore, an axle for said second knifeeccentrically mounted on and parallel to the axis of said cylindricalmember whereby'on rotation of said cylindrical member said knives maybemoved out of axial register, a spring in said bore urging saidcylindrical member axially of said bore to force said second kniferesiliently into operative relationship with said first mentioned knife,and means on said cylindrical member extending from said bore forretracting said cylindrical member and for rotating it.

4. In an apparatus of the class described, the combination of a knife, asecond knife in cooperative relation thereto and having a support havinga cylindrical boretherein, a cylindrical member rotatably and slidablymounted in said bore, an

axle for saidsecond knife eccentrically mounted on and parallel to theaxis of said cylindrical member whereby on rotation of said cylindricalmember said knives may be moved out of axial register, a spring in saidbore urging said cylindrical member axially of said bore to force saidsecond knife resiliently into operative relationship with said firstmentioned knife, a pin and slot connection between said cylindricalmember and said support including a slot having a portion extendingalong said bore to lock said cylindrical member against rotation whenthe knives are in on said rotary means and parallel. to the axisthereof, resilient means bearing on said rotary means to resilientlyurge said rotary means axially to resiliently hold said knives incooperative relationship, and means for retracting said rotary meansaxially against the force of said resilient means to separate saidknives and for rotating said rotary means to separate said knives by theeccentric movement of the axis for said second knife when the kniveshave been separated by the axial retraction of said rotary means, andmeans for holding said rotary means in retracted position. v

6. In an apparatus of the class described, the combination of a knife, asecond knife in cooperative relation thereto and having a supportcomprising axially movable rotary means and an axle for said secondknife eccentrically mounted on said rotary means and parallel to theaxis thereof, resilient meansbearing on said rotary means to resilientlyurge said'rotary means axially to resiliently hold said knivesin'cooperative relationship, and means for retracting said rotary meansaxially against the vforce of said resilient means to separate saidknives and for rotating said rotary means toseparate said knives by thecocentricmovement of the axis for said second knife when the knives havebeen separated by the axial retraction of said rotary means.

DAVID R. McKINLEY. PETER J VAN NORDEN.

